Really no use in wider than the stock 265's. All you are doing is adding weight with a larger tire. Probably an extra 4 or 5 pounds each tire that is more weight at the very maximum point from the hub which is the absolute worst. So 5 pounds that far from the hub is similar to wheels that maybe way 15 pounds more than stock effectively if you want to look at it that way. Big difference and you do not need any extra grip with stock power

That is why the GTS comes with a 285 out back...

The M3 needs more rubber out back, I have 285s out back and the car has to be driven at the apex with your foot on the throttle like its on egg shells. At best a PSSs 295/30/19 is just 3lbs heavier than the taller 265/35/19s and just 1lb lighter than a 285/30/19.